<template>
  <li>
    <label>
      <input type="checkbox" :checked="todo.done" @click="handle(todo.id)" />
      <!-- 如下代码也能实现功能，但不推荐，因为违反原则，修改了props，只是vue没有监视到 -->
      <!-- <input type="checkbox" v-model="todo.done"> -->

      <span>{{ todo.title }}</span>
    </label>
    <button class="btn btn-danger" @click="handledelete(todo.id)">删除</button>
  </li>
</template>

<script>
export default {
  name: "MyItem",
  data() {
    return {};
  },
  methods: {
    //勾选或者取消勾选
    handle(id) {
      //通知app组件将对应的todo的done值取反
      this.checkTodo(id);
    },
    handledelete(id) {
      if (confirm("确定删除这一项吗?")) {
        this.deleteTodo(id);
      }
    },
  },
  props: ["todo", "checkTodo", "deleteTodo"],
};
</script>

<style scoped lang="css">
/*item*/
li {
  list-style: none;
  height: 36px;
  line-height: 36px;
  padding: 0 5px;
  border-bottom: 1px solid #ddd;
}

li label {
  float: left;
  cursor: pointer;
}

li label li input {
  vertical-align: middle;
  margin-right: 6px;
  position: relative;
  top: -1px;
}

li button {
  float: right;
  display: none;
  margin-top: 3px;
}

li:before {
  content: initial;
}

li:last-child {
  border-bottom: none;
}
li:hover {
  background-color: #ddd;
}
li:hover button {
  display: block;
}
</style>
